function deltF=func_deltF(PG,PVi,PGi,wG,wD,PG0,PD0,PD,Busnum,Loadi)

t1=2*wG.*(PG(PGi) - PG0(PGi) );
t2=2*wD.*(PD(Loadi)-PD0(Loadi));
deltF=[
    sparse(t1);
    sparse(size(PVi,1),1);
    sparse(t2);
    sparse(length(Loadi),1);
    sparse(2*Busnum,1);
];

end